he sent me a PM asking some questions, and i said to give me a call , as i did not have the info at my fingertips, but he has tried to call me but keeps missing me, so i dug up the info for all, soooo here ya go...for the M240, the M2120 is very close, although the crossover point may be lower....

Stereo mode....both switches out, RCA to Low in jack,left and right speakers to speaker out wires.
mono mode.....same but with mono switch in,mono speaker to
Left +/Rt.-using the Left + as speaker +, left input is the mono input...

Bi-amp mode.....bi-amp switch in ,this amp becomes the sub amp.can run in stereo or mono mode as above but output will only be 115 hz and below.
115 hz and above will come out of bi-amp RCA. this can then
go to an other amp as hi-pass input sig.
the tech.stuff.......
120 watts per channel into 4 ohms,20-20kHz,both channels driven,13.8volts
no more than 0.15%THD.240watts mono 20-20kHz no more than 0.15%THD.
S/n greater than 100dB.Subsonic filter at 15Hz.cross over 18dB/octave @115Hz

you can run 4 or 8 ohm load in mono ,I would be careful in a 4 ohm load of
high volumes......the amp puts out only 150 watts mono into a 4 ohm load
but 240 watts into a 8 ohm load, so not only do you get more power into 8
ohms but better control

danw2002 wrote:Paul, see my PM to you, i know all about this amp.

Dan Williams
carver nut,
who lives only
a few miles from
their old office....

Hi Dan, Thanks for your help the other day over the phone. Try and try again, they say. It was refreshing to talk with another "old school"-type. Just a little update:

Everything's up and running, though I'm awaiting delivery of an RCA cable with right angle ends. It is very nice. The CJ5 is too dang small and nothing fits!!

As a test to see if the 'mono' function sums the channels post-switch, I attached the speaker in mono and ran an input into the RIGHT channel only. I had mono output. So I'm running it bi-amped and mono.

I did not install my active x-over (an Alphasonic, by the way) yet. I'll feed the amps with my pink noise generator and check it with a RTA first. If it comes through pretty flat maybe I won't bother with the x-over at all. Otherwise that'll be my next project.